ELEGAN Black Empty Square Plastic Umbrella Base Suitable for umbrellas from 9 to 11 feet with poles 1.5" to 1.9" diameter Caps remove easily for filling with water, or sand. Made from Durable Long Last High Density Plastic, metal carry handle Dimension: 17.5" * 17.5", Height: 5.5 " Weight with water: 40 lbs High quality umbrella base will not rust, dent, or leak